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Display device

a display device and display technology, applied in the direction of electrical apparatus construction details, instruments, casings/cabinets/drawers, etc., can solve the problems of deterioration of display quality, deterioration of dust-proof performance, and reduction of hardness or strength of the form-elastic body made of rubber material, so as to achieve excellent dust-proof protection and display quality. excellent

Active Publication Date: 2013-07-30
NEC LCD TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The configuration ensures durable dust-proof protection and high display quality by maintaining the film member's followability to the display panel's behavior, reducing manufacturing costs, and preventing displacement or removal of the film member, thus enhancing the overall performance and longevity of the display device.

Problems solved by technology

If the form-elastic body has lost elasticity due to aged deterioration, the display panel is subject to more load, leading to deterioration of display quality.
Further, if the form-elastic body has lost elasticity due to aged deterioration, the form-elastic body will lose followability to the behavior of the liquid-crystal panel under vibration or temperature changes, possibly leading to deterioration of the dust-proof performance.
On the other hand, when a display device including a form-elastic body is used in a high-temperature environment, not only the hardness or strength of the form-elastic body made of a rubber material will be reduced, but also the form-elastic body will undergo material deterioration until it suffers from permanent distortion as a result of having been exposed to the high-temperature environment for a long period of time.
This will induce a problem of deterioration in dust-proof performance due to reduction of sealing effect of the form-elastic body or due to deterioration of followability of the form-elastic body to the behavior of the liquid-crystal panel under vibration or temperature changes.
Further, the form-elastic body used in JP 2005-91971A is an expensive rubber molded item, and special dies are required to form its characteristic shape, whereby the manufacturing cost is increased.

Method used

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Examples

Experimental program
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Effect test

first embodiment

[0046]FIG. 1 is a partial exploded cross-sectional view of a display device illustrating a configuration according to a first embodiment of the invention. A liquid-crystal display device 1 is shown here as a specific example of the display device. The shown liquid-crystal display device 1 has a display panel (a liquid crystal display panel in this example) 6, a front frame 7 provided on the front side, that is, on the display face side of the display panel 6, and a backside member 20 disposed on the rear face of the display panel 6.

[0047]The backside member 20 has a backlight unit 8 for illuminating the liquid crystal display panel forming the display panel 6 from the back side thereof. The shown backlight unit 8 includes a rear frame 2, a light guide plate 4, an optical sheet 5, and a light source 9. The light guide plate 4 is disposed under the optical sheet 5 to define a lamp house of the light source 9. The light guide plate 4 has a bottom face and a side face covered with a ref...

second embodiment

[0072]A display device according to a second embodiment of this invention will be described with reference to FIGS. 15, 16, and 17.

[0073]FIG. 15 is a partial exploded cross-sectional view illustrating a display device according to the second embodiment of this invention. Like in the first embodiment, FIG. 15 illustrates a liquid-crystal display device 1. The liquid-crystal display device 1 shown in FIG. 15 is different from the one according to the first embodiment in that it includes a chassis 3 provided with a step portion 3b in addition to a slope portion 3a. Specifically, the step portion 3b is formed by a groove between an inclined portion of the slope portion 3a and a planar region of the chassis 3. According to this configuration, one end of the film member 10 can be placed in contact with the step portion 3b.

[0074]The chassis 3 having the step portion 3b and the slope portion 3a can also be produced easily by integral molding.

[0075]FIG. 16 shows a state in which the display...

third embodiment

[0087]Referring to FIG. 23, a display device according to a third embodiment of this invention will be described.

[0088]FIG. 23 is an exploded cross-sectional view illustrating a liquid-crystal display device 1 according to the third embodiment of this invention. The liquid-crystal display device 1 shown in FIG. 23 has a backside member 20 including a backlight unit 8, a chassis 3 forming a front framework of the backlight unit 8, and a rear frame 2 forming a backside framework of the backlight unit 8. In this third embodiment, like in the first embodiment, the chassis 3 is provided with a slope portion 3a that is formed integrally. In the shown example, the third embodiment is different from the first and second embodiments in that the film member 10 is fixed to the chassis 3 having the slope portion 3a and to the rear frame 2.

[0089]Describing more specifically, the fixed portion 10a of the film member 10 shown in FIG. 23 is fixed to the slope portion 3a of the chassis 3, while the ...

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Abstract

The invention provides a display device in which a slope portion is provided in the chassis of the backside member to be nonparallel to the display face of the display panel, and a film member is fixed along the slope portion, and the end of the film member extends beyond the slope portion to be in contact with the display panel, whereby a substantially close contact is established between the chassis and the display panel, and hence the display device can provide excellent dust-proof protection and durability.

Description

[0001]This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2010-286140, filed on Dec. 22, 2010, the disclosure of which is incorporated herein in its entirety by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]This invention relates to flat panel display (FPD) devices, including liquid-crystal display devices, organic EL display devices, and field emission display (FED) devices (hereafter, referred simply as display devices), and particularly relates to liquid-crystal display devices.[0004]2. Related Art[0005]A display device, in general, has a display panel, a front frame provided on the front side of the display panel, and a backside member provided on the back side of the display panel. The backside member includes a backside support frame for supporting the display panel from the back side. The display panel is held between the front frame and the backside support frame of the backside member.[0006]The f...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G02F1/1333
CPCG02F1/133308G02B6/0088G02F2001/133311G02F2001/133317G02F2001/133325G02F2202/022G02F1/133615G02F1/133311G02F1/133317G02F1/133325
Inventor SUGAWARA, HIDEAKI
Owner NEC LCD TECH CORP